1161562830 has 64 divisors (see below), whose sum is σ = 2869516800. Its totient is φ = 300703104.

The previous prime is 1161562771. The next prime is 1161562837. The reversal of 1161562830 is 382651611.

It is a super-5 number, since 5×1161562830⁵ (a number of 47 digits) contains 55555 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1161562791 and 1161562800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161562837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 664017 + ... + 665763.

It is an arithmetic number, because the mean of its divisors is an integer number (44836200).

Almost surely, 2^1161562830 is an apocalyptic number.

1161562830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161562830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1434758400).

1161562830 is an abundant number, since it is smaller than the sum of its proper divisors (1707953970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161562830 is a wasteful number, since it uses less digits than its factorization.

1161562830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1161562830 is about 34081.7081438123. The cubic root of 1161562830 is about 1051.1892285366.

The spelling of 1161562830 in words is "one billion, one hundred sixty-one million, five hundred sixty-two thousand, eight hundred thirty".